Xzar for ChatGPT
si.xzar/xzar
Crash-test your AI agent on real professional decisions, graded against what actually happened.
client:ChatGPT
transport:streamable-http
runtime:pypi
Install Xzar in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.xzar.si/mcpCustom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs